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Emission of Electromagnetic Pulses from Laser Wakefields through Linear Mode Conversion
Author(s) -
Z. M. Sheng,
K. Mima,
Jie Zhang,
Heiji Sanuki
Publication year - 2005
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.94.095003
Subject(s) - physics , laser , plasma , terahertz radiation , plasma acceleration , atomic physics , oscillation (cell signaling) , electromagnetic pulse , pulse (music) , optics , acceleration , computational physics , nuclear physics , detector , biology , genetics , classical mechanics
Powerful coherent emission around the plasma oscillation frequency can be produced from a laser wakefield through linear mode conversion. This occurs when the laser pulse is incident obliquely to the density gradient of inhomogeneous plasmas. The emission spectrum and conversion efficiency are obtained analytically, which are in agreement with particle-in-cell simulations. The emission can be tuned to be a radiation source in the terahertz region and with field strengths as large as a few GV/m, suitable for high-field applications. The emission also provides a simple way to measure the wakefield produced for particle acceleration.

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